[R] How to create a line and bar panel chart with two different axes?

[Deepayan Sarkar]

On Wed, Mar 3, 2010 at 12:35 PM, DougNiu <dhua at umn.edu> wrote:
>
> I need to create a line and bar panel chart with two different axes. I tried
> in lattice but couldn't get it worked. Here is my code:
>
> data(barley)
> barchart(yield ~ variety | site, data = barley,
>              groups = year, layout = c(1,6), stack = F,
>              auto.key = list(points = FALSE, rectangles = TRUE, space =
> "right"),
>              ylab = "Barley Yield (bushels/acre)",
>              scales = list(x = list(rot = 45)))
>
> Suppose now I need to add two lines in each panel to show the cost (10^3
> dollars) of each type (Svansota,....,Trebi) at different locations
> (Waseca,..., Grand Rapids) for 1931 and 1932.
>
> Can any body tell me how I should do to create this chart with two different
> axes (one is yield, the other is cost)?

A couple of relevant examples:

http://lmdvr.r-forge.r-project.org/figures/figures.html?chapter=05;figure=05_13;
http://lmdvr.r-forge.r-project.org/figures/figures.html?chapter=08;figure=08_06;

-Deepayan